Nissan Pathfinder (2006 year). Manual — part 220
DTC P2A00, P2A03 A/F SENSOR 1
EC-619
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2006 Pathfinder
11.
REPLACE A/F SENSOR 1
Replace A/F sensor 1.
CAUTION:
●
Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
●
Before installing new A/F sensor, clean exhaust system threads using Heated Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
>> GO TO 12.
12.
CONFIRM A/F ADJUSTMENT DATA
1.
Turn ignition switch ON.
2.
Select “A/F ADJ-B1” and “A/F ADJ-B2” in “DATA MONITOR”
mode with CONSULT-II.
3.
Make sure that “0” is displayed on CONSULT-II screen.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 13.
PBIB3202E
EC-620
DTC P2A00, P2A03 A/F SENSOR 1
2006 Pathfinder
13.
CREAR A/F ADJUSTMENT DATA
With CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.
3.
Clear the self-learning control coefficient by touching “CLEAR”.
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF.
3.
Disconnect mass air flow sensor harness connector.
4.
Restart engine and let it idle for at least 5 seconds.
5.
Stop engine and reconnect mass air flow sensor harness con-
nector.
6.
Make sure DTC P0102 is displayed.
7.
Erase the DTC memory. Refer to
EMISSION-RELATED DIAGNOSTIC INFORMATION"
.
8.
Make sure DTC P0000 is displayed.
>> GO TO 14.
14.
CONFIRM A/F ADJUSTMENT DATA
1.
Turn ignition switch OFF and then ON.
2.
Select “A/F ADJ-B1” and “A/F ADJ-B2” in “DATA MONITOR”
mode with CONSULT-II.
3.
Make sure that “0” is displayed on CONSULT-II screen.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 13.
Removal and Installation
UBS00KEM
AIR FUEL RATIO (A/F) SENSOR 1
EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST"
SEF968Y
BBIA0541E
PBIB3202E
ASCD BRAKE SWITCH
EC-621
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2006 Pathfinder
ASCD BRAKE SWITCH
PFP:25320
Component Description
UBS00KIP
When the brake pedal is depressed, ASCD brake switch is turned
OFF and stop lamp switch is turned ON. ECM detects the state of
the brake pedal by this input of two kinds (ON/OFF signal).
Refer to
EC-29, "AUTOMATIC SPEED CONTROL DEVICE (ASCD)"
for the ASCD function.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KIQ
Specification data are reference values.
BBIA0560E
MONITOR ITEM
CONDITION
SPECIFICATION
BRAKE SW 1
(ASCD brake switch)
●
Ignition switch: ON
Brake pedal: Fully released
ON
Brake pedal: Slightly depressed
OFF
BRAKE SW 2
(stop lamp switch)
●
Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
EC-622
ASCD BRAKE SWITCH
2006 Pathfinder
Wiring Diagram
UBS00KIR
BBWA1990E
ASCD BRAKE SWITCH
EC-623
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2006 Pathfinder
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
UBS00KIS
1.
CHECK OVERALL FUNCTION-I
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-II.
3.
Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-II
1.
Turn ignition switch ON.
2.
Check voltage between ECM terminal 108 and ground under the
following conditions.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
101
LG
Stop lamp switch
[Ignition switch: OFF]
●
Brake pedal: Fully released
Approximately 0V
[Ignition switch: OFF]
●
Brake pedal: Slightly depressed
BATTERY VOLTAGE
(11 - 14V)
108
LG
ASCD brake switch
[Ignition switch: ON]
●
Brake pedal: Slightly depressed
Approximately 0V
[Ignition switch: ON]
●
Brake pedal: Fully released
BATTERY VOLTAGE
(11 - 14V)
CONDITION
INDICATION
When brake pedal: Slightly depressed
OFF
When brake pedal: Fully released
ON
SEC011D
CONDITION
VOLTAGE
When brake pedal: Slightly depressed
Approximately 0V
When brake pedal: Fully released
Battery voltage
MBIB0061E
EC-624
ASCD BRAKE SWITCH
2006 Pathfinder
2.
CHECK OVERALL FUNCTION-II
With CONSULT-II
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
Without CONSULT-II
Check voltage between ECM terminal 101 and ground under the following conditions.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 7.
CONDITION
INDICATION
When brake pedal: Fully released
OFF
When brake pedal: Slightly depressed
ON
SEC013D
CONDITION
VOLTAGE
When brake pedal: Fully released
Approximately 0V
When brake pedal: Slightly depressed
Battery voltage
MBIB0060E
ASCD BRAKE SWITCH
EC-625
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2006 Pathfinder
3.
CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ASCD brake switch harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between ASCD brake switch terminal 1 and
ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Fuse block (J/B) connector E160
●
10A fuse
●
Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit or short to ground in harness or connectors.
5.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminal 108 and ASCD brake switch terminal 2.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK ASCD BRAKE SWITCH
Refer to
EC-627, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace ASCD brake switch.
BBIA0560E
Voltage: Battery voltage
PBIB0857E
Continuity should exist.
EC-626
ASCD BRAKE SWITCH
2006 Pathfinder
7.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect stop lamp switch harness connector.
3.
Check voltage between stop lamp switch terminal 1 and ground
with CONSULT -II or tester.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
●
Fuse block (J/B) connector E160
●
10A fuse
●
Harness for open or short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.
Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 10.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
10.
CHECK STOP LAMP SWITCH
EC-627, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace stop lamp switch.
BBIA0560E
Voltage: Battery voltage
PBIB1184E
Continuity should exist.
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